I just returned from JOELANTA. I had a great time. Somehow Duluth/Northeast Atlanta managed to dodge the weather. A lot of other folks weren't so lucky.
I'll have these files up for you later this week. This is a bit advanced if you plan to do the whole mod, it requires you to saw the Wrekkin Rig in half and use a significant amount of glue/epoxy. I'll try to put together some instructions.
This kit includes files for: the grill, headlights, sleeper cab, trailer hitch, exhaust stacks, air filters, fuel tanks, and horns.